Thanks to doit, Nikola builds are incremental, which makes them extremely fast.

Nikola rebuilds only the files that need rebuilding — in other words, all the assets (JS, CSS) and older posts are left in place. Incremental rebuilds save CPU time, wall clock time and upload bandwidth (rsync will only upload some of the files).

Only a handful of files were changed or created this time. Nikola created/updated archives, tag/category pages, tag cloud data, post sources, post pages, indexes, RSS and sitemaps. A lot of things were left untouched, including the assets.

The list is pretty similar. The archives page links to years, so it did not have to be changed. The first post was changed to add a link to the second one. Note that the tag page for foo was left untouched, the new post does not use it.